Examlex
In a short essay,discuss the differences between primary and secondary data.Include a specific example of each to support your answer.
Pepsinogen
Substance that is secreted by the chief cells in the lining of the stomach and becomes pepsin in the presence of acid.
Chief Cells
Cells in the lining of the stomach that secrete pepsinogen.
Mucous Cells
Cells that are found in the salivary glands and the lining of the stomach and that secrete mucus.
Stomach Lining
The inner layer of the stomach, which contains glands that produce stomach acid and enzymes for digestion.
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